Yes you can some colleges have choice to opt out between some optional subjects and uou can select for them if you wanna study computer as a subject of yours. and if you just wanna study it as your interest then there's a vast sea on the internet from where you can learn.

Sir I an biology student in class 12th no meth subject can I stady computer  science.?

Have you got admission, were you from biology

Yes, you can study computer science , Abhijeet. But it quite tough to study. I will recommend you to take computer science with maths...

Can I do b tech civil engineering ?

Sir can i take computer science  in 11th-12th with basic math

If you want to study Computer Science then instead of B.tech you can opt for BCA. There are many universities where you can take admission in BCA even if you have Biology without Maths in 12th.

You can also check Courses after 12th in Biology

I'm the same as you.

I didn't have maths in 12th and didn't get computer science in Collage.

BUT, there is a slight chance you can. In VIT there is a course CSE(spl.Bioinformatics). Basically computer science. (Don't mess with this course if you don't have any idea about CS)

They will coach you for a month before the first semester. But, there are only 100 seats. If you can't rank under 7000 or lower than that. SO, all you got do is get good rank in that and attend the exam in first 2 days a luck charm.

Warning: It's just a chance don't put your whole career on the line. have BackUps

As others have already answered, for B.Tech Computer Science and even for B.Sc Computer Science, you need to have maths in your Class XII. But would like to inform you about NIIT University's 4 year Integrated M.Sc Computer Science programme is a unique for PCB Students without maths.

To enable students to cope with the rigor of the Computer Science discipline which rests heavily on mathematics, they are expected to undergo a carefully designed Bridge Programme in Mathematics. The Bridge Programme is spread across the first two semesters of the M.Sc Programme.

The students at the end of the programme would sit in placement along with B.Tech CSE students and can expect similiar placements. Refer https://www.niituniversity.in/programmes/m-sc-cs for more details

A Biology student can not apply for B.tech CSE. To get Admission for CSE you must have 10+2 with Mathematics and Physics as compulsory subjects.

With Biology, Chemistry, and Physics at 10+2 you can opt for career in Life Sciences. If you are choosing career in Life Science, then some of the courses that can be considered for graduation are:

Bachelor courses (B. Sc.) in core Life Science subjects, that include specialization in Zoology, Botany, Geology, Microbiology, Immunology, Biochemistry, Biomedical engineering, Genetics

Bachelor courses in Applied sciences: Biotechnology, Forensic Sciences and criminology, Bioinformatics.
Bachelor course in Pharmacy (B Pharma).

Bachelor of Science in Agriculture: Agricultural Meteorology, Agronomy
Bachelor of Science in Food Technology

Bachelor of Physiotherapy

Good Luck!